Sash-ventilator.



N0. 852,717. PATBNTED MAY 7, 1907- l V H. D. HARRIS.

SASH VBNTILATQR. dA1 11.I L`.1.10N FILED Nov. 16. 190e.

' citizen of the United States of America, ref

HARVEY D. HARRIS, OF DENVER, COLORADO.

SASH-VENTHLATOR.

Specification of Letters Patent.

Patented May 7, 1907.

Application filed November 16, 1906. Serial No. 343,710.

T0 LZZ whom, it may concern:

Be it known that I, HARVEY D. HARRIS, a

siding in the city and county of Denver and State of Colorado, have invented a new and useful Sash-Ventilator, of which the following is a specification.

My invention relates to improvements in sash ventilators for windows and doors, and the objects of my invention are: First, to provide a screened ventilator which can be adjustably opened and locked in an open position at several predetermined parts of its air capacity. Second, to provide a sash screen ventilator that is spring-controlled in one direction of its operative movement. And third, to provide a simple, inexpensive, and durable ventilator. I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1, is a vertical, sectional view through the lower sash rail of a window sash, illustrating the application of my improved ventilator. Fig. 2, is a front View of a portion of the door plate, showing the springcontrolled door and door catch. And Fig. 3, is a rear view of the same.

Similar letters of reference refer to similar parts throughout the several views.

Referring to the drawings, the numeral 1, designates a metal plate, which is secured upon the inner face of the sash rail 2, of a window, preferably the lower sash. The plate lies over an opening 3, of suitable length, formed in the sash rail, and is provided with Ventilating aperture 4, of suitable dimensions, the greater part of whose area is above the center of the plate. On the outside of the window sash, and over the opening 3 therein, is secured a plate 5, having a Ventilating aperture 6, the greater part of whose area is below the center of the plate.l Thus, the aperture 4 of the plate 1, is on a higher plane than the aperture 6 of the plate 5, and over the aperture 6, is secured a piece of screen cloth 7. 4Adjacent to each upper corner of the aperture 4 of the plate 1, is secured an ear S, these ears being within the opening of the sash rail, and between these ears is hinged a door 9, which is provided with integral ears 10, corresponding to the ears 8. The ears 8 and 10 have registering holes, through which passes the ends of a spring rod 11, the central portion of which is bent down and rests against the door 9, below its center, while its ends, after passing 1. A thumb plate 12, is secured at one end to the upper edge of the door and projects through the opening 4 into the room, and is arranged to be pressed down by an occupant of the room when it is desired to open the Ventilating door.

The lower edge of the door extends `to and,

engages a locking bar 13, which is pivotally hinged adjacent to its inner end to ears 14, on the inside of the plate 1, by a pin 15. This lock bar is curved upward from its pivotal connection with the plate 1, concentric with the pivotal center of the door, and extends toward the screen. its inner edge is pro- Vided with a plurality of stops 16, which are spaced to engage the lower edge of the door at different predetermined points of the doors opening swinging movement, the notches being arranged in the form of ratchet teeth, which are positioned to normally lock the door against closing and to hold it from a slightly opened to a fully opened position consequently the door when opened will run over the ratchet teeth, but will engage them when closing. The lock bar is held in engagement with the .lower edge of the door by a spring 17, one end of which is secured to the plate 1, while its opposite end is arranged to bear with resilient tension against the bar and hold it normally against the edge of the door. The opposite end of this lock bar extends loosely through a notch 18, formed in the plate, and its end is curved slightly downward, and forms a hnger catch 19, by slightly lifting which the teeth or stops of the bar are thrown out of engagement with the edge of the door, should the door be open, and the spring 11 will then close the door and eut off the Ventilation.

The operation is as follows: Whenever it is desired to open the ventilator door the occupant of the room places a -linger underneath the linger catch of the locking bar, and his thumb on the thumb plate of the door, and presses the two together, which double movement tilts or swings the door outward, andat the same time throws the lock-bar outward; and when the door is opened suiiiciently, the lock bar is released, and the tooth or stop immediately behind the door, will engage the door and hold it open; or the IOO thumb plate alone may be pressed down, which will open the door, the lower edge of which will slide over the teeth of the lock bar, until the door is opened to the desired point. Consequently, the door can be opened fully or only partially, and the lock bar will engage it at the nearest notch it is stopped at, and in order to close the ventilator door it is only necessary to pull on the iinger plate of the lock-bar to release the door, which is then closed by the spring 11. The upper edge of the door is curved concentrically with its pivotal point, which permits the door to open freely, the curved portion also serving to vclose the space between the door and the upper portion of the aperture 4, as the door is opened.

' Ii' desired, a catch 2O may be formed at the upper end of the locking bar, which will limit the upward movement of the door.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a window sash ventilator, the com- ,bination with the window sash provided with f an aperture, of a screen over the outer side of said aperture, a plate secured over the inside of said aperture, a door pivotally hinged to said plate, a spring-controlled lock-bar provided with ratchet teeth arranged to resiliently engage the edge of said door, and means for opening said door and for releasing and closing said door when released.

2. In a window sash ventilator, the combination of the window sash containing an aperture, a screen plate provided with a screen secured to the outside of said sash over said aperture, a plate secured to the inside of said sash over said aperture having an air inlet and outlet opening into said aperture and screen, a door pivotally hinged to said i'rame at the upper side oi said aperture and arranged to swing in said aperture toward Asaid screen, having a curved upper edge adapted to bear against said plate and close the joint between said door and frame, a spring arranged to normally hold said door closed over the aperture in said plate, a curved ratchet toothed bar pivotally secured to said door plate below its aperture, curved concentrically to said doors pivotal center and adapted to engage the lower edge of said door, a spring arranged to hold said ratchet toothed bar normally in engagement with the edge of said door and finger grasping plates on said door and ratchet bar projecting through said door plate on the inside of said sash.

3. In a window sash ventilator, the combination with a sash having a Ventilating aperture open to the atmosphere on one side,

and to a room on the other, ot the screen plate secured on the outside of said sash, the door plate provided with an air inlet and outlet aperture secured to the inside of said sash, the spring-controlled door arranged to be normally held closed, a ratchet toothed rock bar spring-controlled to normally engage said door and lock and hold said door at various predetermined points of its opening movement, and linger grasping plates extending from said lock bar and door through said door plate on the inside of' said sash.

In testimony whereof I aHiX my signature in presence of two witnesses.

HARVEY D. HARRIS.

Witnesses: 1

G. SARGENT ELLIOTT,

ADELLA M. FowLE. 

